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A bag contains 7 blue balls and 5 yellow balls , if two balls are selected at random, what is the probability that none is yellow ?

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A bag contains 7 blue balls and 5 yellow balls , if two balls are selected at random, what is the probability that none is yellow ? A. 5 35 B. 5 22 C. 7 22 D. 7 33 Select the correct answer from above options

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Correct Answer - C Blue balls =7 Yellow balls = 5 None- ball out of two yellow i.e., Both balls are blue Total balls = 12 ⇒P ( both blue balls ) = 7 12 × 6 11 = 7 22

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